Diesel generator sets are mechanical equipment, which are prone to failure during long-term work. Common methods of judging failures are listening, watching, and checking. The most effective and direct method is to judge by the sound of the generator, and minor faults can be eliminated by sound to avoid major failures. Let's take a look at how to judge the working status of diesel generator sets from the sound:
1. When the diesel engine of the diesel generator set is running at a low speed, a metal knocking sound can be clearly heard next to the valve cover. This sound is caused by the collision between the valve and the rocker arm, and the main reason is that the valve clearance is too large. Valve clearance is one of the main technical indicators of diesel engines. If the valve clearance is too large or too small, the diesel engine cannot work normally. If the valve clearance is too large, the displacement between the rocker arm and the valve is too large, and the impact force generated by the contact is also large, so a "click, click" metal knocking sound is emitted. This sound often occurs after the engine has been working for a long time. Therefore, the valve clearance should be readjusted every 300 hours or so of the engine.
2. When the diesel engine of the diesel generator set suddenly drops from high speed to low speed, a "dang, dang, dang" impact sound can be clearly heard at the top of the cylinder. This is one of the common faults of diesel engines. The main reason is that the gap between the piston pin and the connecting rod bushing is too large, and a lateral dynamic imbalance is generated by the sudden change of the engine speed, causing the piston pin to swing left and right while rotating in the connecting rod bushing, causing the piston pin to hit the connecting rod bushing and make a sound. In order to avoid greater failures, unnecessary waste and economic losses, the piston pin and connecting rod bushing should be replaced in time to ensure that the diesel engine can work normally and effectively.
